Poromarto Susilo H, Nelson Berlin D
Department of Plant Pathology, North Dakota State University, Fargo, 58108-6050.
Plant Dis. 2009 May;93(5):507-511. doi: 10.1094/PDIS-93-5-0507.
Dry bean (Phaseolus vulgaris) is a host of the soybean cyst nematode (SCN; Heterodera glycines). Twenty-four cultivars of dry bean representing pinto, navy, black, and kidney bean classes were evaluated for host suitability for SCN HG type 0 in the greenhouse. Females of SCN developed normally on all dry bean cultivars in 30 days. Eggs collected from roots of dry bean plants were as effective as inoculum for soybean as eggs collected from roots of soybean. Averaged over experiments, the number of SCN females per plant was significantly lower (P ≤ 0.001) on pinto, navy, and black bean than on the susceptible soybean Lee 74. There was no difference in the number of females between kidney bean and soybean. Numbers of females per plant differed (P ≤ 0.001) among navy cultivars but not among cultivars in the other three bean classes. A female index (FI = the average number of females on the test plant divided by the average number of females on the susceptible soybean Lee 74 × 100) was calculated for each cultivar to evaluate resistance to SCN. FIs varied from 5 to 117, indicating a range of susceptibility in the crop. Kidney bean averaged the highest FI at 110, followed by navy, pinto, and black at FI = 41, 39, and 16, respectively. SCN is a potential threat to dry bean in the northern production area of North Dakota and northern Minnesota.
干豆（菜豆）是大豆胞囊线虫（SCN；大豆异皮线虫）的寄主。在温室中评估了代表斑豆、海军豆、黑豆和芸豆品种的24个干豆品种对SCN HG 0型的寄主适宜性。30天内，SCN雌虫在所有干豆品种上均正常发育。从干豆植株根上收集的卵作为大豆接种物的效果与从大豆根上收集的卵相同。在各试验中，斑豆、海军豆和黑豆上单株SCN雌虫数量显著低于（P≤0.001）感病大豆品种Lee 74。芸豆和大豆的雌虫数量没有差异。海军豆品种间单株雌虫数量存在差异（P≤0.001），但其他三个豆种的品种间无差异。计算每个品种的雌虫指数（FI = 试验植株上雌虫平均数除以感病大豆品种Lee 74上雌虫平均数×100）来评估对SCN的抗性。FI值在5至117之间，表明该作物存在一定范围的感病性。芸豆的FI平均值最高，为110，其次是海军豆、斑豆和黑豆，FI分别为41、39和16。SCN对北达科他州北部和明尼苏达州北部的干豆产区构成潜在威胁。
